{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2023-42118 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2023-42118 is a high-severity vulnerability in Exim libspf2, published on 3 May 2024. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2023-42118 and fix it if it is affected.\n\nWhat it is: CVE-2023-42118 is a high-severity vulnerability in Exim libspf2, published on 3 May 2024. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2023-42118 in the wild and no public exploit code.\n\nAffected product: Exim libspf2. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2023-42118/ (Markdown: https://insights.sbomify.com/CVE-2023-42118/index.md)","id":"CVE-2023-42118","markdown":"https://insights.sbomify.com/CVE-2023-42118/index.md","name":"CVE-2023-42118","record":{"aliases":["ALPINE-CVE-2023-42118","DEBIAN-CVE-2023-42118","GHSA-2vq7-8vvf-w66v","OESA-2024-2584","OESA-2024-2585","OESA-2024-2586","OESA-2025-1077","UBUNTU-CVE-2023-42118"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["code_execution"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Exim mail server","requires_auth":"none","summary":"Network-adjacent attackers can execute arbitrary code on Exim mail servers via an integer underflow in libspf2 SPF macro parsing.","user_interaction":"not_required","vuln_class":"integer_overflow"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"zdi","cpe":[{"product":"libspf2","vendor":"libspf2_project"}],"cvss":{"score":7.5,"severity":"high","source":"cna","vector":"CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.0"},"cwes":[{"id":"CWE-191","name":"Integer Underflow (Wrap or Wraparound)"}],"description":"Exim libspf2 Integer Underflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Exim libspf2. Authentication is not required to exploit this vulnerability. \n\nThe specific flaw exists within the parsing of SPF macros. When parsing SPF macros, the process does not properly validate user-supplied data, which can result in an integer underflow before writing to memory. An attacker can leverage this vulnerability to execute code in the context of the service account.\n. Was ZDI-CAN-17578.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Exim libspf2 Integer Underflow Remote Code Execution Vulnerability","id":"CVE-2023-42118","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"integer_overflow","year":"2023"},"n_packages":0,"n_references":1,"next":{"headline":"Exim dnsdb Out-Of-Bounds Read Information Disclosure Vulnerability","id":"CVE-2023-42119"},"packages":[],"prev":{"headline":"Exim Improper Neutralization of Special Elements Remote Code Execution Vulnerability","id":"CVE-2023-42117"},"products":["libspf2"],"published":"2024-05-03","related":[{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2021-33913","kev_date_added":null,"published":"2022-01-19"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2025-03-28","vendors":["Exim"]},"summary":"Network-adjacent attackers can execute arbitrary code on Exim mail servers via an integer underflow in libspf2 SPF macro parsing.","url":"https://insights.sbomify.com/CVE-2023-42118/"}